The mass of a puppy increases from 1.25 kg to 10 kg when fully grown. What is the percentage of the adult mass compared with the puppy mass?

To work this out it helps to visualize the masses.
The mass has gone up by a factor of × 8 and therefore the adult mass is 800% of the puppy mass. this is equivalent to a 700% increase not 800%. Imagine the puppy’s mass as being 100%. The increase in mass from 1.25kg to 10kg is equivalent to an increase by a factor of × 8, therefore 8 × 100 = 800%.

Alternatively, to calculate the adult mass as a percentage of the puppy mass, write the masses as a fraction and multiply by 100.

Transcribed Image Text:

Puppy Adult 1.25kg = 100% 10kg = 800%